LA880 Optical Power Meteris a good kind of CATV Equipment. Key Functions: Absolute Optical Power Measurement Relative Optical Power MeasurementFeatures: multi-wavelength, High precision, Low Power waste. Wide temperature range, backlight, big character LCD display enables you have a good time at work. User friendly interface design. Technical Specifications: Measure range: -40dBm +26dBm Calibrate wave: 850nm,1300nm,1310nm,1490nm,1550nm,1625nm Resolution: 0.01dBm Precision: Basic ±2.35%(±0.10dB) @-30dBm @22.5C±2.5C Full ±4.8% (±0.2dB) @-40dBm +26dBm Fiber connector: FC/SC/ST multi-cinnecter REF set: Yes Wave respond: 700 1700 nm Battery charge: Yes(selective) Operating temp.: -10°C +55°C Store temp.: -20°C +70°C Humidity: 90% no dew Battery style: AA*2 Size: 160mm*75mm*32mm Weight: About 100g(no jacket)